. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects. ilar lo that of C. Lowianum. but narrowerand lighter in colour; disc bearing a few red-brownspots. Column ycllowisli-green. lined and dotted withred-brown on the face, and sutTused with dark red-purple at the apexi i?. A. Rol^e. As a rule, many colonies are found on onetree, A small Goat Willow in my own gardenhad in October last no fewer than six largecolonies and several smaller ones, the large onesfrom 0 to S inches long. The tree is only 9 feethigh. Each colony starts by a single-winged vi-viparo
. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects. ilar lo that of C. Lowianum. but narrowerand lighter in colour; disc bearing a few red-brownspots. Column ycllowisli-green. lined and dotted withred-brown on the face, and sutTused with dark red-purple at the apexi i?. A. Rol^e. As a rule, many colonies are found on onetree, A small Goat Willow in my own gardenhad in October last no fewer than six largecolonies and several smaller ones, the large onesfrom 0 to S inches long. The tree is only 9 feethigh. Each colony starts by a single-winged vi-viparous female, who crawls from a neighbouringmass of the aphides and at once commences todeposit living young. The rate of growth of acolony is rapid. During rather wet and dampiveather one was noticed to increase from 5 to 8inches long in four days, and during that periodvery many winged females had flown awayfrom it. In all attacks that I have observed the insectsare grouped together side by side, with theirheads pointing upwards, not, as stated byBuckton and quoted by myselff with all their. Fig. U2 —oiant willow ,\pni^-. heads turned downwards. I have frequentlywatched colonies start, and they always commencewith their heads in the same position as when theyare in large groups. Now and again a stray speci-men may be in the reverse position. These largeaphides are always attended at the close of theseason by numbers of wasps. The wasps,as noticed by a correspondent. Miss J. BorroughsNorgate,J at Enfield, feed off the honeydew,which drojis down on to the leaves beneath theinsects. William Curtis also noticed this phe-nomenon, and also that beetles totally disregardedthe honey-dew. Eecently I have found that antswill not touch it, as they do the honeydew of otherplant-lice; nor will bees feed upon it. The flow ofthis gummy mattt r is very copious at certain times,especially in warm weather, but even in dull andrainy weather a considerable quantity is excreted. * MonojTuph (»/ J
Size: 1167px × 2142px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookdecade1870, booksubjectgardening, booksubjecthorticulture